On my NT 32buds most cables are routed along the ibeam on drivers side.
There are cross trusses that some cables cross over at various points and may be tied to.
My power center is on driver side and kitchen is on door side.
I would suggest using a camera or smart phone or an inspection camera and remove a screw or two from coroplast to take pictures or video underneath your rv.
Just need to be able to point the camera or stick the camera inside the area and to take pictures. So one or two screws removed usually works to make a hole to reach in to take pictures.
Harbor freight has an inexpensive inspection camera as an example
https://www.harborfreight.com/digital-inspection-camera-61839.html